140 entries under basis topic. ×

1
bottom line(noun, expression, support, good, end)
1
center(noun, support, action, cause, start)
1
chapter and verse(noun, expression, idiom, information, cause)
1
confirmation(noun, information, approval, argument, picture)
1
core(noun, support, action, understanding, cause)
1
crux(noun, support, action, cause, start)
1
dope(noun, verb, cause, base, call)
1
exculpation(noun, approval, argument, explanation, excuse)
1
exoneration(noun, approval, argument, explanation, excuse)
1
extenuation(noun, trick, approval, argument, explanation)
1
fundamental(noun, support, regulation, action, cause)
1
goods(noun, information, cause, base, call)
1
groundwork(cause, substance, source, justification)
1
hypothesis(noun, form, action, end, feeling)
1
information(noun, understanding, cause, knowledge, base)
1
marrow(noun, feeling, cause, start, energy)
1
mitigation(noun, trick, escape, approval, argument)
1
nitty-gritty(noun, support, good, end, understanding)
1
nub(noun, support, good, end, understanding)
1
nucleus(noun, support, action, cause, start)
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APASmart Define. (2016). reason thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/reason/thesaurus/synonyms
ChicagoSmart Define. 2016. "reason thesaurus" https://smartdefine.org/reason/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, reason thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/reason/thesaurus/synonyms>.
MLASmart Define. "reason thesaurus" 25 February 2016. Web. 23 September 2026. <https://smartdefine.org/reason/thesaurus/synonyms>